If something means 5 FPS lost for a high end computer, it probably means 15 or more for a low spec computer.
FPS matters. There's a reason why 60hz is the "minimum" for a monitor and not 30. There's a reason why VR demands 90+ hz displays. There's also a reason why people can notice a very clear difference between 60/144/244hz displays. Humans can definitely perceive much higher rates of change than "35" or else we would just set like.. 40 as a target and call it a day.
I still don't actually know what your point was for the screensavers. It's not a feature that would make LFS better in the ways that matter, nor would it be something that most people even leave enabled as it's just a waste of computing power that could be used for things that matter.
Only 35FPS? Really? I've seen as much as 150 frames in a second. Of course I worked in a picture framing shop at the time. Think they'll model a picture framing shop in the updated version of S. City?
I think there is a difference between frame rate and refresh rate of the screen.
I can have 1000FPS on a 30Hz display... of course the refresh rate will be the limiting factor.
30FPS on 60Hz monitor looks smooth enough, but 60FPS on 30Hz monitor looks like crap.
I just wanted to say thank you for picking up working on LFS again. I've been around here since god knows how long and LFS is still the first thing I fire up when testing new equipment.
It's also my absolute VR benchmark, nobody does head movement and mirrors better than LFS - and all of that while being very light on graphics.